Machine fob crttshing stone



.G. H. WOOD. GRUSHING STONE.

No. 28,031.- Patented Aprr24, 1860.

UNITED STATES PATENT OFFICE.

GEORGE H. WOOD, OF GREEN BAY, WISCONSIN.

MACHINE FOR CRUSHING STONE.

Specification of Letters Patent No. 28,031, dated April 24. 1860.

T 0 all whom 'it may concern:

Be it known that I, GEORGE HAZEN WVooo,

of the city of Green Bay, in the State of- Wisconsin, have invented a new and useful Machine for Crushing Stone, Quartz, Ores, or Any other Substances Capable of Being Reduced or Pulverized by Pressure; and I do hereby declare that the following is a full and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, in which- Figure 1 is a vertical section, Fig. 2 is a horizontal section of the bottom, and Fig. 3 is a horizontal section of the cap or top part of said machine.

Similar letters of reference refer to like parts in all the drawings.

To enable others skilled in the art to make, and use my invention, I will proceed to describe its construction and operation.

A, A, is a strong frame of wood or iron.

B, is a circular crushing box strongly made of cast iron or other suitable material. Its inner sides are either parallel with each other or diverging from the bottom upward according to the size of the material to be crushed. Near the upper opening, the sides are made to flare outward for the convenience of feeding the machine. Said crushing box (B) is made with a projecting rim at the top, through which it is firmly bolted to the cap (G) and has also projecting arms Y), b, Z), Z), at its bottom through which it is bolted to the frame (A). The bottom of B on the inside is furnished with openings (0, 0, o) to discharge the crushed material and also with a hole or pin ((1) in the center, on which or through which is stepped the bottom of the shaft (D).

C, is a strong cap of cast iron or other suitable material, strongly bolted to the top of the crushing box (B) and having a hole in its center in which the shaft (D) is turned. It has also one or more openings in its sides through which to feed the material to be crushed intd the box (B).

D, is a solid shaft of wrought or cast iron. The portion represented by D, D, and its journal (cl) being in a perpendicular line and constituting the main shaft, and the portion represented by D, D, being eccentric to said main shaft, the eccentricity being greatest at the top of D, D, and ceasing at a short distance below the bottom of the roller The degree of eccentric motion required at the top of D, D, is to be determined in different machines by the power to be employed and the amount of pressure required; and the distance below the bottom of (E) at which the axes of D, D, (Z and D, D, meet or tend to meet is determined by the degree of fineness to which it is desired to reduce the crushed material. The part D, D, is made of such size that the roller (E), fitted to it, can pass over the journal (cl) of the main shaft.

E, is a crushing roller of cast iron or other suitable material fitted to the shaft D, D, which is easily to move in it. It is held from slipping up and down on its shaft D, D, by a pin (5/) and washers (h, h) and is raised or lowered on its shaft, by placing the washers above it or below it, its position being determined by the degree of coarseness or fineness to which it is de sired to reduce. the crushed material. This roller (E) is in the shape of two truncated cones placed base to base, the upper cone forming with the crushing box (B) a wedge shaped opening in which the material is to be crushed, and its upper end being beveled toward the center so as to allow the stone or other material to be crushed, to pass easily down between the roller and crushing box. The lower cone of the roller is short and has its lines parallel with those of the crushing box and is intended to replace any wear in the roller at the base of its upper cone. 7

F, is a pulley or lever by which the power is applied and the machine operated.

Operation: The shaft (D) being turned by power applied to the pulley or lever (F) each point in the outer surface of the crushing roller (E) is caused at each revolution to approach and recede from the inner face of the crushing box (B), thus crushing, by a rolling pressure, any material lodged in the wedge shaped opening between said roller and crushing box, all the material, being partially crushed at one revolution, falls lower down as the roller recedes from the box and at the next revolution receives a new pressure, until being reduced to the requisite fineness it passes down between the rollers and crushing box and out through the apertures in the bottom of the box The slight opening and closing of the space between the rollers and crushing box at each 3. I claim also the combination and ar rangement of the shaft D, D, d and the crushing roller E With the crushing box (B) when used and operated substantially as specified for the purpose of crushing Without grinding stone, quartz or any other material which can be crushed or pulverized by pressure.

GEORGE HAZEN WOOD.

Witnesses I. S FISK, CHAS. L. WHEELOGK. 

